Close#20098, in the NPM registry API, implemented to match what's described by https://github.com/npm/registry/blob/master/docs/REGISTRY-API.md#get-v1search
Currently have only implemented the bare minimum to work with the [Unity Package Manager](https://docs.unity3d.com/Manual/upm-ui.html).
Co-authored-by: Jack Vine <jackv@jack-lemur-suse.cat-prometheus.ts.net>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
